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S) (n = 1, 2, 3) transitions with partial widths of 300 - 400 keV [1116]. Lately Belle S) (n = 1, 2, three) transitions with partial widths of 300 - 400 keV [1116]. Recently Belle reported preliminary benefits around the observation of (5S) (1S, 2S) and (5S) + - (1D) with anomalously massive prices [985]. It is proposed that these anomalies are as a result of rescatterings [1123,1124]. The substantial branching fraction on the (4S) (1S) decay observed in 2010 by BaBar could possess a similar origin [1125]. The mechanism can be MedChemExpress Cy5 NHS Ester regarded either as a rescatter??ing with the D D or B B mesons, or as a contribution from the molecular element for the quarkonium wave function. ?The model in which Y (4260) is usually a D1 (2420) D molecule naturally explains the higher probability in the intermediate molecular resonance within the Y (4260) + - J/ transitions [1126,1127] and predicts the Y (4260) X (3872) transitions with higher prices [1128]. Such transitions have lately been observed by BES III, with [1107] K + - (2S)2981 Page 74 ofEur. Phys. J. C (2014) 74:[e+ e- X (3872)] 11 . [e+ e- + - J/](4.15)Despite striking similarities involving the observations in the charmonium and bottomonium sectors, there are also clear differences. Within the charmonium sector, each and every in the Y (3915), (4040), (4160), Y (4260), Y (4360) and Y (4660) decays to only one particular particular final state with charmonium [ J/, J/, + - J/ or + - (2S)]. In the bottomonium sector, there is certainly 1 state with anomalous properties, the (5S), and it decays to distinct channels with related rates [ + - (nS), + - h b (m P), + - (1D), (nS)]. There's no basic model describing these peculiarities. To clarify the affinity from the charmonium-like states to some certain channels, the notion of "hadrocharmonium" was proposed in [1084]. It is a heavy quarkonium embedded into a cloud of light hadron(s), thus the fallapart decay is dominant. Hadrocharmonium could also give an explanation for title= jir.2014.0001 the charged charmonium-like states Z (4430)+ , Z (4050)+ and Z (4250)+ . four.3.five Summary Quarkonium spectroscopy enjoys an intensive flood of new benefits. The amount of spin-singlet bottomonium states has enhanced from 1 to 4 over the final 2 years, like a a lot more precise measurement of your b (1S) mass, 11 MeV away in the PDG2012 typical. There is certainly proof for one of the two nonetheless missing narrow charmonium states anticipated ??inside the area between the D D and D D thresholds. Observations and detailed studies in the charged bottomoniumlike states Z b (10610) and Z b (10650) and initially benefits around the charged charmonium-like states Z c open a wealthy phenomenological field to study exotic states near open flavor thresholds. There is also significant progress and also a far more clear experimental circumstance for the very excited heavy quarkonium states above open flavor thresholds. Current highlights contain confirmation in the Y (4140) state by CMS and D0, observation on the decays (4040, 4160) J/ by Belle, measurement of your energy dependence in the e+ e- + - h c cross section by BES III, observation with the Y (4260) X (3872) by BES III and determination on the Z (4430) spin arity from complete amplitude analysis by Belle.

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